0 a small animal with fur and no tail that people sometimes keep as a pet -- porcellino d’India
1 someone who is used in a test for something such as a new medicine or product -- cavia
2 a small animal, like a rabbit, with short ears and often kept as a pet. -- porcellino d’India
3 a person used as the subject of an experiment -- cavia
He was used as a guinea-pig for the new drug trials.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Possiamo completarlo passo dopo passo, indipendentemente dalla lunghezza della strada, e non può essere completato, per quanto breve sia la strada, se non segni nemmeno la tua impronta.